PokerSolver
PokerSolver/5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb/BB vs BTN iso raise 2.5bb

BB vs BTN iso raise 2.5bb

5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (blinds 0.5/1bb, ante 0.16bb) · 150bb · CO limps, BTN isolates to 2.5bb · Big blind to act

5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bbChange game
Stacks (bb), if they differ
Pot 5.8bbYour cards?
1bb
1bb
2.5bb
0.5bb

Tap your two cards.

Big blind's range

1,326 of 1,326 combos get here
Fold 69.6%Call 22.4%Raise 5/7.5bb 8%
Tap a hand, or type one above, to see its exact mix.

What is the GTO play for the big blind (BB) when CO limps, BTN isolates to 2.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb at 150bb?

CO limps, BTN isolates to 2.5bb in 5-max · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb, 150bb: the big blind (BB) folds 69.6%, calls 22.4% and raises 5/7.5bb 8%. Always call: 22-44, A6s, A2s-A3s, K8s, K6s, K2s-K3s, Q8s, T8s, 96s+, 75s, 64s, 53s, ATo-AJo, KJo+, QJo. Always raise 5/7.5bb: KK+, AKs, QJs. Mixed: 55-QQ, A7s-AQs, A4s-A5s, K9s+, K7s, K4s-K5s, Q9s-QTs, Q4s-Q7s, J7s+, T9s, T7s, 95s, 85s+, 76s, 65s, 54s, 43s, AQo+, A9o, A5o, KTo, QTo, JTo, 65o, 54o.

Always fold
Q2s-Q3s, J2s-J6s, T2s-T6s, 92s-94s, 82s-84s, 72s-74s, 62s-63s, 52s, 42s, 32s, A6o-A8o, A2o-A4o, K2o-K9o, Q2o-Q9o, J2o-J9o, T2o+, 92o+, 82o+, 72o+, 62o-64o, 52o-53o, 42o+, 32o
Always call
22-44, A6s, A2s-A3s, K8s, K6s, K2s-K3s, Q8s, T8s, 96s+, 75s, 64s, 53s, ATo-AJo, KJo+, QJo
Always raise 5/7.5bb
KK+, AKs, QJs
Mixed
55-QQ, A7s-AQs, A4s-A5s, K9s+, K7s, K4s-K5s, Q9s-QTs, Q4s-Q7s, J7s+, T9s, T7s, 95s, 85s+, 76s, 65s, 54s, 43s, AQo+, A9o, A5o, KTo, QTo, JTo, 65o, 54o
Settings: 5-max · 150bb · SB 0.5bb · ante 0.16bb · 5% rake, cap 8bb (small blind 0.5bb, big blind 1bb, an ante of 0.16bb from every player, 150bb stacks, 5% rake capped at 8bb; no rake when no flop is dealt). Solver: HoldemResources Calculator (HRC) (HRC CI 24.89). A jackpot fee on bigger pots is not in this solve, so lines that build big pots may be slightly too loose. Bet sizes are the solved ones; a size that is not here plays like the nearest one.

Fits exactly: no game we have checked.

Close: CoinPoker cash with antes NL50 (rake before the flop in 3-bet pots there, none here).

Rake sources: the ante from 93 of our own CoinPoker hands at $0.25/$0.50 with a $0.08 ante, played 2026-09-30; the caps and the preflop rule from coinpoker.com/games/texas-holdem/, fetched 2026-10-31.